package io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyDemo2 {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("image.png");
        FileOutputStream fos = new FileOutputStream("image_cp2.png");

        byte[]data = new byte[1024*10];//10kb
        int d;//记录每次实际读取到的字节量

        long start = System.currentTimeMillis();
        while ((d =fis.read(data))!=-1){
            fos.write(data,0,d);
        }
        long end = System.currentTimeMillis();
        System.out.println("复制完毕了!耗时:"+(end-start)+"ms");

        fis.close();
        fos.close();

    }
}
